Thunder was taken along with his sister Alya aka Lightning. They were both experimented on activating both their metahuman powers. The twins escaped N.O.W.H.E.R.E.'s facility named the Colony along with Rose Wilson, Ridge and Beast Boy to form the new Ravagers.
- Sound Manipulation: The Colony brings each child's genetic potential to the surface. Thunder can generate a full spectrum of sound waves in concentrated blasts. Specifically, Thunder can create "thunder claps" that are powerful blasts that radiate from his body.
- Power Instability: Because of the genetic testing done on Alexei, he cannot stop his thunder from echoing once it's produced. Therefore the Colony had to implant cerebral implants to allow him a degree of control necessary to stop him. These implants are common among the Colony's children.
- 21 Appearances of Alexei (Prime Earth)
- 4 Images featuring Alexei (Prime Earth)
- Quotations by or about Alexei (Prime Earth)
- Character Gallery: Alexei (Prime Earth)